Slide-valve.



F. D. BUTLER.

suoe VALVE. APPLICATION FILED :unzs. 1915.

Patented July 4, 1916.

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suns VALVE. APPLICATION FILED JULYZG, I915.

Patented July 4, 1916.

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SLIDE VALVE.

APPLICATlOH FILED 1ULY26. I915.

Patented July 4, 1916.

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SLIDE VALVE.

APPLICATION man JULY26. 1915.

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Fl TTOR/VEVS FRANK D. BUTLER, OF BURLINGTON, IOWA.

SLIDE-VALVE.

Specification of Letters Patent.

Patented July 4, 1916.

Application filed July 26, 1915. Serial No. 41,855.

To all :whom it may concern:

Be it known that I, FRANK D. BUTLER, a citizen of the United States, aresident of Burlington, in the county of Des Moines' and State of Iowa,have invented new and useful Improvements in Slide-Valves, off which thefollowing is a specification.

My invention relates to improvements in slide valves for steam enginesand the principal object is to provide a valve with a maximum port andpassage opening for the control of the admission and exhaust of steam toand from the cylinders thereof.

A further object is the provision of a valve of the character specified,having a plurality of seating surfaces, each surface having a pluralityof admission ports and a plurality of exhaust ports and passages so asto afford double admission and double exhaust to and from the cylinderof the steam engine through the ports and passages in each of saidseating surfaces of the valve.

Another object is the provision of a valve packing that is economical inconstruction and maintenance and is efficient in aflording a steam-tightjoint between the steam chest cover and the valve.

A further object is the provision of a combined steam chest cover andexhaust and inlet manifold, which Will reduce to a minimum cracking ofthe cylinder which is caused by the superheated steam in the ordinaryarrangement of steam passages.

A further object is the provision of a steam chest with a plurality ofvalve seats, each seat having a plurality of inlet and exhaust ports orpassages, leading to either end of the cylinder adapted to cooperatewith ports or passages in the valve so as to provide double admissionand double exhaust to and from either end of the cylinder.

To the accomplishment of the foregoing and such other objects as mayhereinafter appear, my invention consists in the combination,construction and arrangement of parts hereinafter described, and thensought to be defined in the appended claims, reference being had to theaccompanying drawings forming a part hereof, and which show merely forthe purpose of illustrative disclosure, a preferred embodiment of myinvention, it being understood that various changes may be made inpractice within the scope of the claims, without digressing from myinventive idea.

In the drawings, Figure 1 represents a vertical transverse section ofthe cylinder construction of a locomotive steam engine, constructed toembody my invention, taken on line ll of Fig. 2. Fig. 2 is a verticallongitudinal section of that portion of the mechanism taken on line 22of Fig. 1; Fig. 3 is a top plan view of the valve seats provided in thesteam chest; Fig. 4 is a vertical transverse section thereof, taken online 4-4 of Fig. 3; Fig. 5 is a longitudinal sec- -tion of the lowerportion of the valve, the

seats therefor, and the upper part of the cylinder, taken substantiallyon line 55 of Fig. 1; Figs. 6 and 7 are similarviews, the valve beingshown in different positions; Fig. 8 is a side elevation of the valve;Fig. 9 is a top plan view of the valve; Fig. 10 is a bottom plan view ofthe valve, connection of the same with the valve spindle or stem beingshownin section to facilitate the disclosure; Fig. 11 is an end view ofthe valve looking at the end to which the valve spindle or stem isattached; Fig. 12 is a transverse section of the valve takensubstantially on line 1212 of Fig. 9; Fig. 13 is an elevation of theother end of the valve.

Throughout the various figures of the drawings, the same characters ofreference are used to refer to the same parts in the different views.

Referring now to the drawings, the numeral l designates the cylindercasting, which includes the cylinder 2 having the flat top portion 3 toreceive the steam chest, having the connection 4 to the boiler for theadmission of live steam and having connections 5 on either side thereofto the stack for the passage of the exhaust steam. The steam chestproper 6 is mounted on the fiat top portion 3 and has the steam chestcover 7, which is provided with the passage 8 registering with thepassage 4 for the inlet of 'live steam and the plurality of passages 9which register with the connection 5 for the passage of the exhauststeam. The steam chest proper 6 includes the base portion 10 which issecured to the flat top portion 3 of the cylinder casting by means ofstuds 11,

suitable gaskets 12 being interposed therebetween. The body portion 13of the steam chest extends upwardly and is secured to the steam chestcover 7 by means of the bolts 14. This steam chest is provided with theintermediate valve portion 15 which valve portion comprises the two flatsurfaces 16 which are inclined at substantially right angles to eachother as shown particularly in Fig. 4. These are the valve seats whichare provided with the plurality of ports 17 17, 18 18, 19 19 and 20 20,the ports of each valve seat being connected in pairs to the passages 21and 21 and 22 and 22 which lead into the ports 23 and 24 at the oppositeends of the cylinder.

The valve proper 25 is actuated by means of the stem or spindle 26passing through the head 27 and provided with a suitable packing 28.This valve is of general triangular cross section, being provided with aplurality of seating surfaces, corresponding to the valve seats 16previously described, these seating surfaces being designated by thereference numeral 29. The valve is hol low for a portion of its length,having the compartment 30 which communicates with the live steam inlet 4by means of the opening 31, which registers with the opening 32 from thepassage 8. This opening is provided with the cylinder packing member 33which has the resilient packing rings 34 and which has the annularflange 35 against which springs 36 bear to force said flange in thesteam-tight manner against the under part ofthe steam chest cover, asshown in Figs. 1 and 2. These springs 36 are seated in recesses orsockets 37 formed in the top portion of the valve 25.

As stated before, the hollow compartment 30 is in constant communicationwith the source of live steam supply and a plurality of ports orpasasges lead outwardly from this compartment 30, said passages or portsbeing designated 38 38, 39 39 and 40 40. Located between said steamadmission ports or passages just referred to, are the exhaust ports orpassages 41 41, 42 42, which are formed by cutting away parts of theside portions of said valve member, as shown in Fig. 12.

The valve spindle or stem is connected to the valve by means of thestuds 43 which are screw threaded on their inner ends and have theshoulders 44 with the reduced screw threaded outer ends 45, washers 46bearing against said shoulders 44 and the securing nuts 47 engaging saidwashers. The stem or spindle has the extended portion 48 provided withthe recesses 49, which are greater in diameter than the studs 43, sothat the spindle and valve may have a slight relative movement. Iprovide between the valve seats 16 in the bottom of the steam chest, a

a groove or recess 50, which prevents the valve from riding on itstriangular point out of its proper position, thereby assuring that theports orpasasges will always register properly.

Assuming that the parts are in the relative position shown in Fig. 6,the operation is as follows. On the movement of the valve to the right,to the position shown in Fig. 5, live steam will be admitted from theconnection 4, passage 8, into the compartment 30 and thence through thepairs of ports 38, 38, 39 39 in the valve and 17 and 17 and 18 and 18 inthe valve seats to the passages 21 and 21 which discharge into thepassage 23 into the right hand end of the cylinder, as shown in Fig. 5.The exhaust steam passes out through port or passage 24 into passages 22and 22 and thence to the pairs of ports 19 19 and 20 and 20 to theexhaust passages in the valve 42 and 42 and by the edges of the valveinto the compartment provided in the steam chest outside of the valveproper, and thence through the exhaust passages 9 to the connection 5 tothe stack.

When the valve moves to the left, as shown in Fig. 7, the course of theinlet and exhaust steam is reversed; that is, the live steam beingadmitted through the compartment 30, ports 39 39, 40 40 in the valve,ports 19 19 and 20 20 in the valve seats to passages 22 and 22 andthence to the passage 24 to the left hand end of the cylinder, theexhaust steam passing through the passage 23 to the passages 21 and 21,ports 17 17, 18 and 18 in the valve seats, ports 41 41 in the valve andbeyond the edge of the valve into the compartment provided in the steamchest, outside of the valve proper and thence through the exhaustpassages 9 to the connection 5 to the stack.

It is therefore obvious, that I have provided a valve having a pluralityof seats, each seat having a plurality of connecting ports or passages,whereby a double admission and exhaust of steam to and from the cylinderis provided; further, by utilizing the particular structure shown, theentire steam chest may be removed and also the valve and valve seats forthe purpose of repair and examination in a very simple mannecting saidpairs of ports with the opposite ends of'the cylinder, aslide valve oftriangular cross section and having a pair of inclined seats, each seathaving a plurality of live steam ports and a plurality of exhaust steamports adapted to register with the pairs of ports in said seats, a steamchest cover having exhaust and inlet manifolds adapted to supply andreceive steam to and from said steam chest.

2. In combination in a steam engine having a cylinder, a steam chestthereon having a pair of inclined seats provided with ports leading tothe ends of the cylinder, a hollow slide valve triangular incross-section and having a pair of inclined seating surfaces providedwith inlet and exhaust ports adapted to register with the ports in saidseats, a steam chest cover having exhaust and inlet manifolds, the inletmanifold opening into said hollow valve, a packing construction for saidvalve including a cylindrical body portion fitting into the hollowportion of said valve and having resilient packing rings, said packingconstruction also including an annular flange and resilient meansbearing against said valve and said annular flange to force the sameagainst the opening from said inlet manifold.

3. In combination in a steam engine having a cylinder with passagesleading to each end of the same, a steam chest thereon having a pair ofinclined seats, each seat having a plurality of ports leading to saidpassages to one end of the cylinder, a valve triangular in shape andhaving a hollow compartment therein, said valve having a pair ofinclined seating surfaces and having a plurality of inlet ports on eachseating surface communicating with said hollow compartment and aplurality of exhaust ports on each surface communicating within saidsteam chest,'said ports adapted to register with the pairs of ports insaid seats in said steam chest, a steam chest cover having inlet andexhaust connections, said inlet connection supplying live steam to thehollow compartment within said valve.

4. In combination in a steam engine, a cylinder having a comparativelyflat top and provided with an upper extension with connections forexhaust and supply of steam, said cylinder having passages to each endthereof, a steam chest mounted on said fiat top and having a pair ofinclined seats provided with a plurality of ports communicating withsaid passages, a valve having a pair of inclined seating surfacescorresponding to said seats, said valve being hollow and having an inletopening out of said hollow portion, a steam chest cover having passagesadapted to communicate with said inlet and exhaust connections, saidinlet passage communicating with said opening from said hollow portion,said valve having a plurality of ports on each of said seating surfacescommunicating with said hollow portion to supply live steam to thecylinder and also having a plurality of exhaust ports on each seatingsurface communicating with the compartment provided outside of saidvalve for the exhaust of steam from said cylinders.

5. In combination in a steam engine, a cylinder, a steam chest thereonhaving a plurality of rectangular valve seats, a valve of triangularshape in cross-section fitting said seats and having an innercompartment, said steam chest having an inlet passage, said valve havinga flanged packing member surrounding the opening of said inlet passageso that said inlet passage is in communication with said compartment,said valve dividing the steam chest into compartments outside thereofwhich are the exhaust steam compartments a plurality of ports leadingfrom each enc oft-he cylinder to said seats, said valve having aplurality of ports leading from said inner compartment to said seats,whereby a plurality of passages are provided to each end of thecylinder.

6. In combination with a cylinder and steam chest of a steam engine,said cylinder having ports leading into each end thereof, said steamchest being mounted on said cylinder and having two rectangular seatingsurfaces arranged at an angle to each other and separated by a groove orclearance channel, each of said seating surfaces having a plurality ofpairs of ports in communication with their respective cylinder ports,there being a pair of ports in each seating surface in communicationwith one end of the cylinder and a pair of ports in each seating surfacein communication with the opposite end of said cylinder, said steamchest having a cover with inlet and exhaust passages in communicationwith the compartment formed between said inclined valve seats and theends of said steam chest, a reciprocating slide valve fitting withinsaid steam chest and having an upstanding packing member adapted toembrace said inlet passage in said steam chest cover, said valve havinga plurality of inlet ports or passages communicating within saidupstanding packing member and adapted to register with said inlet andexhaust ports in the seating surfaces, said Valve also having aplurality of exhaust ports communicating without said upstanding packingmember and adapted to register with, said inlet and exhaust ports in theseating surfaces, these ports or passages being so arranged as toprovide a double admission and a double exhaust through each seatingsurface to and from either cylinder end.

7. In combination with a cylinder, steam chest and steam chest coverhaving inlet and exhaust passages and a plurality of rectangular seatingsurfaces, a reciprocating hollow slide valve having two rectangularseating surfaces located at an angle to each other and fitting saidseating surfaces of the steam chest, said valve having an upstandingpacking member adapted to form a steam tight connection between thehollow compartment within said valve and the inlet passage in said steamchest cover, each of said seating surfaces in said steam chest having apair of cylinder ports at each end thereof in communication with theirrespective cylinder ends, said valve having two outer ports and anintermediate port on each of its two seating surfaces and incommunication with the hollow compartment within said valve, said valvealso having two exhaust ports on each seating surface, said ports beinglocated on either side of said intermediate ports and havingcommunication with the compartment within the steam chest around saidvalve, said ports in said valve cooperating'with said ports in saidsteam chest and arranged as to give a double admission and a double ex-1 mounted thereon having two rectangular seating surfaces located at anangle to each other and having a clearance groove between said seatingsurfaces, each of said seating surfaces having a pair of ports at eachend thereof and in communication with the cylinder ports, said steamchest having a steam chest cover with inlet and exhaust passages thereincommunicating with the steam supply and exhaust, a hollow reciprocatingslide valve fitting between said seats in said steam chest and having asteam tight connection between the inlet passage in said steam chestcover and the interior chamber in said valve member.

FRANK D. BUTLER. WVitnesses:

P. F. CARSPECKEN, LAURA H. CARLsoN.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, D. 0.

